Silicone has a face centered cubic crystal structure with, Ask an Expert

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silicone has a face centered cubic crystal structure with unit cell length of 5.43 angstroms and four atoms per unit cell. A) how many silicon atoms are there in 1 cm3 of material? B) suppose you dope that 1 cm3 sample of silicon with 1 ppm of phosphorus that will increase the conductivity by a factor of a million. how many mg of phosphorus are required?

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